Life & fun · alternatives · 2026

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Flexbox Builder, a tool for visualizing responsive flexbox launched in 2019; newer entries below may have overtaken it.

1. 1
   Webflow Flexbox UI Builder▲444

   Build flexible, responsive layouts - without writing code

   2016 · flexbox.webflow.com · its alternatives →

2. 2
   FlexboxPatterns▲374

   Build awesome user interfaces with CSS flexbox

   2016 · flexboxpatterns.com · its alternatives →

3. 3LF
   Lightweight Flexbox responsive grid framework▲5

   2015 · meetsally.com · its alternatives →

4. 4
   Flex▲325

   Flexbox's are a pain to write, Flex makes it easy.

   2019 · its alternatives →

5. 5
   Flexbox Froggy▲97

   A game for learning CSS flexbox

   2015 · flexboxfroggy.com · its alternatives →

6. 6
   Unraveling Flexbox▲59

   Become a flexbox master

   2015 · 321greetings.com · its alternatives →

7. 7SW
   Struggle with CSS Flexbox? This Playground Is for You▲315

   Experiment with different flex properties to understand how they affect layout. Adjust the controls below to see changes in real-time and copy the generated CSS code.

   2025 · yoavsbg.github.io · its alternatives →

8. 8
   Automated Responsive Design Testing▲65

   A step-by-step guide to cross-browser layout testing

   2016 · tinnedfruit.com · its alternatives →

9. 9SA
   Sitestencil, a new way of building websites with flexbox and gutters▲9

   2016 · sitestencil.com · its alternatives →

10. 10
    Flexbox.io – a free video series on learning CSS Flexbox▲236

    A simple 20 video course that will help you master CSS Flexbox

    2015 · flexbox.io · its alternatives →

11. 11
    Layout – Cropping is Hard▲68

    Figma, and the future of design tools

    2015 · layout.fm · its alternatives →

12. 12
    Flex Layout Attribute▲109

    Layout helper based on CSS flexbox specification.

    2016 · progressivered.com · its alternatives →

13. 13IF
    Interactive Flexbox Tutorial▲13

    2015 · flex-tutorial.herokuapp.com · its alternatives →

14. 14TA
    Treeflex – A flexbox based library for drawing hierarchy trees with CSS▲6

    2018 · dumptyd.github.io · its alternatives →

15. 15
    Squints▲81

    Design tools for the live web

    27d ago · squints.app · its alternatives →

16. 16
    Impulse▲84

    Dynamic JS Animations for the Mobile Web

    2014 · impulse.luster.io · its alternatives →

17. 17
    Flexpoint▲1

    A <3kb breakpoint-based flexbox grid implementation

    2016 · francisco.io · its alternatives →

18. 18FE
    Flexible Editor – An Open Source Flex-Box Based Layout Editor▲40

    2016 · briandiehr.com · its alternatives →

19. 19FA
    FlexMasonry – A lightweight masonry library powered by flexbox▲5

    2019 · flexmasonry.now.sh · its alternatives →

20. 20
    Fleximize Mission▲60

    A unique mission statement using SVG animation

    2016 · fleximize.com · its alternatives →

21. 21
    Flexbox Froggy▲9

    A cool game for learning CSS flexbox

    2015 · flexboxfroggy.com · its alternatives →

22. 22FA
    Flexi, a layout framework for Ember.js▲5

    2016 · runspired.github.io · its alternatives →

23. 23DB
    Drag boxes around and watch a layout engine infer the Flexbox (no AI)▲7

    Jul 2026 · wpconverters.com · its alternatives →

24. 24SA
    Sandbox – A lightweight CSS only framework▲7

    2019 · dlcnine.github.io · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →